c7443fe52b
more things can return error now in a couple of places we had to swallow errors because they didn't fit the existing API. in these case and proactively in a few others we now return error as well. also the batch API has been updated to allow performing set/delete internal within the batch
91 lines
1.8 KiB
Go
91 lines
1.8 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package boltdb
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import (
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"github.com/boltdb/bolt"
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)
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type Iterator struct {
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store *Store
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ownTx bool
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tx *bolt.Tx
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cursor *bolt.Cursor
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valid bool
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key []byte
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val []byte
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}
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func newIterator(store *Store) *Iterator {
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tx, _ := store.db.Begin(false)
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b := tx.Bucket([]byte(store.bucket))
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cursor := b.Cursor()
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return &Iterator{
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store: store,
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tx: tx,
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ownTx: true,
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cursor: cursor,
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}
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}
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func newIteratorExistingTx(store *Store, tx *bolt.Tx) *Iterator {
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b := tx.Bucket([]byte(store.bucket))
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cursor := b.Cursor()
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return &Iterator{
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store: store,
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tx: tx,
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cursor: cursor,
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}
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}
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func (i *Iterator) SeekFirst() {
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i.key, i.val = i.cursor.First()
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i.valid = (i.key != nil)
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}
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func (i *Iterator) Seek(k []byte) {
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i.key, i.val = i.cursor.Seek(k)
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i.valid = (i.key != nil)
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}
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func (i *Iterator) Next() {
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i.key, i.val = i.cursor.Next()
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i.valid = (i.key != nil)
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}
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func (i *Iterator) Current() ([]byte, []byte, bool) {
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return i.key, i.val, i.valid
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}
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func (i *Iterator) Key() []byte {
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return i.key
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}
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func (i *Iterator) Value() []byte {
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return i.val
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}
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func (i *Iterator) Valid() bool {
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return i.valid
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}
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func (i *Iterator) Close() error {
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// only close the transaction if we opened it
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if i.ownTx {
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return i.tx.Rollback()
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}
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return nil
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}
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